Adding-machine.



O. W. GOOGH.

' ADDING MACHINE. APPLICATION IILED OGT. 10, 190 7.

35,6OG I Patented Sept. 28, 1909.

UNITED STATES PATENT OFFICE.

CLAIBORNE W. GOOCI-I, OF LYNGHBURG, VIRGINIA, ASSIGNOR T BURROUGHSADDING MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

ADDING-MACHINE;

/ Specification of LettersPatent.

Patented Sept. 28, 1909.

Application filed. October 10, 1907. Serial No. 396,855.

-1nents in ridding-Machines, of which the following is a SPSClfiCHtlOIl.

platen. vide for properly adjusting The present invention relatesmoreparticularly to the recording or printing mechanism of an adding machineand the object is to provide an improved form of means for regulatingthe force of the blow of the hammers which drive the type against theThis is desirable in order to prothe work'in hand. Thus when aconsiderable number of carbon copies are to be made greater force in thehammer blow is necessary than when a less number of carbon copies or nocarbons at all are to be produced. ()fcotuse with the hammer-actuatingdevices arranged to elfect a printing blow suflicie'nt for the maximumnumber of carbon copies the machine would be equipped to perform allsorts of work without absolutely requiring dii'lerent adjustments fordifferent kinds of work in hand. However, the use of the machine withhammer-actuating springs under cX- cessive tension would be productiveof undue wear and so it is desirable to provide for regulating thetension of such springs according to the requirements 'of thework to beperformed.

In the present instance the'invention is shown and described as adaptedto a wellknown form of adding machine,'to-wit the Burroughs machineexemplified in prior patents Nos. 504,963 and 505,078 issued September12., 1893. It is -to be understood, however, that the inventionmay beadapted to other types of adding machines.

In the accompanying drawings which form part of this specificationFigure 1 represents in left side elevation, partly in section, asutlicient portion of an adding ma-.

chine of the Burroughs type to show the present invention embodiedtherein; and Fig. 2 represents a partial cross-section of such machine,the parts introduced for carrying out the present invention appearing inrear elevation.

Many of the mechanical. elements illustrated in the drawings do notdiffer in form the machine to with the driving levers 716, also thelatches.

or arrangement from those familiarly employed in the well-knownBurroughs machine and hence require no extended discussion although theywill be briefly referred to inasmuch as the new parts for carrying outthe present invention are more or less directly associated with them.

The reference numeral (300 designates a cross-shaft on which are looselyhung a series of levers 611 with segmental rear ends carrying typeplates 618.

he reference numeral 1798 designates a roller platen against which .thetype plates are driven by hammers 715, the latter being pivotallymounted and operatively engaged pivotally mounted. The latter havesprings 780 con nected with them and tending to impel them rearwardlyand thus drive the hammers against the type plates. Said driving leversare normally restrained by latches 717 pivoted upon a suitablecross-shaft and engaging the upper ends of the driving leversrespectively. The displacement of these latches to release the hammersis brought about through pawls 718 engaging shoulders of the latches,these pawls being pivotally mounted upon the cross-bar or rod of a bail719 which vibrates at each operation of the machine. The springs 780 areconnected with said pawls so as to serve the double purpose of actuatingthe driving levers 716 and holding the pawls in engagement with Thehammers and their drivers are retracted by a. bail 712 which isconnected by a link 729 with a crank plate 801 on a rock-shaft 800 whichoscillates in every operation of the machine.

For the purpose of the present invention the driving levers 716 areformed with 'rearwardly extending branches 716 and additional springs 2are attached to the extremities of these branches, one spring beingattached to each driving lever. The forward ends of these springs arefastened to the cross-bar of a bail 3 Whose sidearms are secured to arock-shaft 4 journaled in the base casting 1065 of the machine. hen thebail is in line with the springs as shown in full lines in Fig. 1 theseadditional springs have no efl'ectnpon the hammers'or their drivers andthe springs 780 act as usual to reduce the hammer blow. These springs80'are of such tension as to elfect a hammer blow of mmimu-m force asfor instance the combination of a hammer copies.

to facilitate this said the hammer blow sufiicient when recording otedhammer or printing to be done without carbon By swinging the bail 3upward and forward the springs 2 may be put under more or less tensionso as to augment the force of the hammer blow, said springs thenoperating conjunctively with the springs 780 to effect such blow. Theswinging of the bail for such purpose is brought about through theturning of the rock-shaft 4 and shaft has one end projecting beyond thebase casting of the machine and equipped with a thumb-piece or knob 5.For the purpose of locking the bail in different adjustments there issecured to the rock-shaft just in rear of said knob a segmental plate 6with a series of perforations or apertures 7 and; there is mounted uponthe base casting designed to engage any one of said apertures. Therock-shaft 4: is permitted a slight longitudinal movement sufficient todisengage the plate (5 from said pin or stud so that it may be turned todifferent positions and the plate reengaged with the stud. A spiralspring 9, surrounding the shaft between the collar thereon and a part ofthe base casting 1065, normally holds said plate engaged with the stud.

It will be seen that the allove-described constrmztion provides meansunder control of the operator whereby the force 'of the hammer blow canbe readily regulated ac cording to the requirements of the work in handand thus the object of the invention is fulfilled. lVhile the particularform of means above described is Well adapted to the fulfilment of thatobject it is nevertheless to be understood that modifications may bemade without necessarily departing from the scope of the invention.

What is claimed is:

1. In a machineof the character described, adapted to strike a printingblow, a spring for actuating said hammer, and a second spring actingupon said hammer and adjustable as to tension for varying the force ofthe printing blow of the hammer.

2. In a machine of the character described, the combination of aprinting hammer, a spring for actuating the same, and a second springacting upon said hammer and adjustable to augment the force of thefirstnamed spring in varying degree.

2-). In a machine of the character described, the combination with aplaten, type, a pivoted hammer for driving the type against the platen,a pivoted driver for said hammer, a spring for actuatingsaid driver, anda second spring attached to said driver and adjustable to augment theforce of the firstmentioned spring in varying degree.

4. In a machine of the character described,

the combination with a platen, type, a piv- 1065 a screw stud 8 fordriving the type against the platen, a pivoted driver for said ham--mer, a spring attached to said driver on one side of its pivot, and asecond spring attached to said driver on the other side of its pivot andadjustable to augment the force of the firstanentioned spring in varying degree.

' 5. In a machine of the character described, the combination of aprinting hammer, a spring acting thereon, an adjustable arm supportingone end of said spring, and means for locking said arm at differentadjustments.

6. In a machine of the character described, the combination of aprinting hammer, a spring acting thereon, a pivoted arm supporting oneend of said spring, a perforated plate moving with said arm, and a pinor -st'ud for engaging any one of the perforations of said plate to lockthe arm at different adjustments.

7 In a machine of the character the combination of a printing hammer, aspring acting thereon, a pivoted arm supporting one end of said spring,a perforated plate moving with said arm and also axially movable. aspring resisting axial movement of said plate, and a fixed stud forengaging any one of the perforations of the plate to lock the arm atdifferent adjustments.

8. In a machine of the character described, the combination of a seriesof printing hammers; a series of springs acting thereon, one for eachhammer; a swinging bail supporting the outer ends of said springs, andmeans for locking said bail at d1fferent adjustments.

9. In a machine of the character described, the combination of a seriesof printing hammers; a series of springs actlng thereon,-- one for eachhammer; a swinging bail supporting the outer ends of said springs, aperforated plate moving with the bail and a stud for engaging any one ofthe perforations of said plate to lock the bail at differentadjustments.

10. In a machine of the character described, the combination of a seriesof printing hammers; a series of springs acting. thcreon,--one for eachhammer; a swinging bail supporting the outer ends of said springs, aperforated plate moving with the bail and axially movable, a springresisting axial movement of the plate, and a fixed stud for engaging anyone of the perforations of said plate to lock the bail at differentadjustments.

11. In a machine of the character described, the combination of a seriesof printing hammers; a series of springs, acting thereon,-one foreach-hammer; a swingin bail supporting the outer ends of sai springs, arock-shaft carrying the ball, a

described,

' perforated plate on said shaft and axially movable, a spring resistingaxial movement thereof, and a fixed stud for engaging any vone of theperforations of said plate to lock the bail atdifierent adjustments.

' 12. In a machine of the character described, the combination of aprinting hammer,- a spring for actuating the same, a second springacting on said hammer, and means for varying the tension of said secondspring comprising an adjustable arm supp' ing one end.,of it.

scribed, the combination of a printing hammer, a spring for actuatingthe same, a

second spring acting on said hammer, means for varying the tension ofsaid second spring comprising an adjustable arm supporting one end ofit, and means for locking said arm at different adjustments.

13. In a machine of the character de- 14. In a machine of the characterdescribed, the combinationpf a printing hammer, a spring for actuatingthe same, a second spring acting on said hammer, and means for varyingthe tension of said second spring comprising a pivotal arm supportingone end of it.

15. In a machine of the character described, the combination of aprinting hammer, a spring for actuating the same, a second spring actingon said hammer, and means for varying the tensipn of said second s rincom risin a ivota arm su ortin o iie 51d of it, a d iiieans for lockiiigsaid arm at different adjustments.

CLAIBORNE W. GOOCH.

